From the 1960s -1990s, Sybil focused more and more attention on home and garden design. She claimed there came a time when a fashion designer must decide whether to create what is fashionable or what is beautiful. Sybil was not willing to compromise her idea of beauty and make designs that were popular. However, she proved successful with interior design too. Her notable achievements include designing fabrics for Bloomingdales department store and fabrics for Brunschwig et Fils.